aluminum	3.0e7S/m
brass		1.0e7S/m
copper		5.0e7S/m
gold		4.0e7S/m
lead		5.0e7S/m
nichrome	10.0e7S/m
silver		6.0e7S/m
tin		9.0e7S/m
tungsten	1.0e7S/m
